.big {
  margin: 0 auto;
  width: 1240px;
}

.form {
  margin-top: 20px;
}

.form lable {
  font-weight: bold;
}

.button {
  margin-top: 20px;
  background-color: #007bff;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
}

.button:hover {
  background-color: #0056b3;
}

/* 提示框 */
.alert {
  width: 400px;
  position: fixed;
  top: 50px;
  left: 50%;
  transform: translateX(-50%);
  display: none;
}
.show {
  display: block !important;
}

.last {
  margin-left: 160px;
}
